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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 534 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.13² =
  2. 2.19² =
  3. 3.23² =
  4. 4.25² =
  5. 5.24² =
  6. 6.29² =
  7. 7.12² =
  8. 8.21² =
  9. 9.28² =
  10. 10.26² =
  11. 11.17² =
  12. 12.15² =
  13. 13.14² =
  14. 14.27² =
  15. 15.11² =
  16. 16.22² =
  17. 17.18² =
  18. 18.16² =
  19. 19.19² =
  20. 20.16² =
  21. 21.24² =
  22. 22.29² =
  23. 23.19² =
  24. 24.13² =
  25. 25.16² =
  26. 26.18² =
  27. 27.12² =
  28. 28.17² =
  29. 29.28² =
  30. 30.21² =
  31. 31.23² =
  32. 32.15² =
  33. 33.26² =
  34. 34.11² =
  35. 35.12² =
  36. 36.28² =
  37. 37.25² =
  38. 38.22² =
  39. 39.22² =
  40. 40.14² =

Answer key

  1. 169
  2. 361
  3. 529
  4. 625
  5. 576
  6. 841
  7. 144
  8. 441
  9. 784
  10. 676
  11. 289
  12. 225
  13. 196
  14. 729
  15. 121
  16. 484
  17. 324
  18. 256
  19. 361
  20. 256
  21. 576
  22. 841
  23. 361
  24. 169
  25. 256
  26. 324
  27. 144
  28. 289
  29. 784
  30. 441
  31. 529
  32. 225
  33. 676
  34. 121
  35. 144
  36. 784
  37. 625
  38. 484
  39. 484
  40. 196

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